Eigenvalue Examples

3D_OILDRUM.PDE

Shows a 3D eigenvalue calculation, the vibrational modes of the air in an oildrum.

3D_PLATE.PDE

Vibrational modes of a free glass plate.

DRUMHEAD.PDE

Vibrational modes of a circular drumhead.

SHIFTGUIDE.PDE

Demonstrates the technique of eigenvalue shifting, using a variation of WAVEGUIDE.PDE.  Compare these results to modes 10-16 of WAVEGUIDE20.PDE.

VIBAR.PDE

Vibrational modes of a metal bar clamped at one end.  This problem analyzes the same structure as "Samples|Time_Dependent|Stress|Vibrate.pde" and "Samples|Time_Dependent|Stress|Harmonic.pde".

WAVEGUIDE.PDE

Transverse-Electric modes of a microwave waveguide.

WAVEGUIDE20.PDE

Transverse-Electric modes of a microwave waveguide.  This is the same as WAVEGUIDE.PDE, except that it calculates 20 modes for comparison with the shifted eigenvalues of SHIFTGUIDE.PDE.